Molding flask



E. C HAFER.

MOLDING FLASK.

APPLICATION FILED MAY19. 1919.

Patented May 16, 1922. 7

INVENTOR earn st FATE? EID'WARD C. I-IAFER, OF CHAIVIBERSBURG, PENNSYLVANIA, ASSIGNOR 'IO JAMES A.

. HAFER, OF CHAMBERSBURG, "PENNSYLVANIA.

MOLDING nLAsK.

Application filed May 19,

To all whom it may concern.

Be it known that I, EDWARD C. HAFER, a citizen of the United States, residing at Chambersburg, in the county of Franklin and State of Pennsylvania, have invented certain new and useful Improvements in Molding Flasks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to molding devices, and particularly to an improved construction of flask for forming molds of small patterns and the like.

The object of this invention is to provide a novel construction of flask wherein the cope and drag or nowel may be substantially similar in construction and the cope provided with a sand strip of novel construction, and a novel operating means for withdrawing the sand strip from the mold. This object of the invention embraces the arrangement of the sand strip operating devices in such a manner that in the natural lifting of the cope the sand strip may be withdrawn from the mold so as to free the same and ofiset possibility of injury to the mold incident to forgetting to withdraw the sand strip before lifting the cope.

Another object of the invention is to provide a sand strip mounting of novel construction and to provide a novel and simply arranged and constructed operating means for withdrawing the sand strip.

WVith these and further objects in view as will in part hereinafter become apparent and in part be stated, the invention comprises certain novel constructions, combinations and arrangements of parts as subsequently specified and claimed.

In the accompanying drawing,

Figure 1 is a perspective View of the cope of a flask, illustrating the features of the present invention applied thereto.

Figure 2 is a fragmentary side elevation of one end of a flask showing the same inverted with the cope uppermost, and showing the features of this invention applied thereto.

Figure 3 is an enlarged fragmentary sec- Specification of Letters Patent.

Patented May 16, 1922.

1919. Serial No. 297,989.

tion taken through one corner of the .cope substantially on the line 33 of Figure 1.

Figure 4 is a transverse section through the drag taken substantially on the line 44: of Figure 1.

Figure 5 is a similar section taken substantially on the line 55 of Figure 1.

Figure 6 is a detail perspective view of the handle and operating arm which is adjustably mounted thereon for retracting the sand strip.

Figure 7 is a fragmentary sectional view taken at right angles to the showing in Figure 4 of the connection between the sand strip and the cope.

Referring to the drawings by numerals, 10 designates the frame 0r body part of a cope which constitutes the lower section or part of a flask and which is adapted to be packed interiorly with sand, and to contain patterns and the like when the cope is seated upon the usual base board. The cope is provided at opposite sides with outstanding flanged brackets 11 which are of any desired number and which are substantially equi-distantly-spaced apart throughout the length of the flask for supporting a rod 12 forming a brace and which passes through apertures in the brackets 11 and extends longitudinally at the side of the cope. The rod 12 is held from turning and also from longitudinal shifting through the brackets 11 by set screws 13, or the like, which are carried by the end brackets. The opposite ends of the rod 12 are offset toward the normal body of the cope 10 and project beyond the opposite ends of the cope to form handles 14: facilitating the carrying and manipulation of the cope. As shown in Figure 1, blocks 15, of wood or the like, may be fitted between and about the adjacent brackets 11 intermediate the ends of the cope 10, and held in place by wood screws or the like as shown in Figure 5. These blocks 15 extend lengthwise of the cope and constitute supports or edges upon which the cope may be turned over from its position shown in Figure 1 to the inverted position illustrated in Figure 2. The

blocks 15 are substantially flush with the outer edges of the brackets 11 and extend to substantially the top and bottom plmies of the cope to provide outstanding edges projecting beyond the brackets and the attachments of the cope to support the latter and prevent injury to the parts.

The upper edge of the cope 10 is provided at each corner with an angularly shaped sand strip 16 having a long leg extending along the side of the cope and having a short leg extending at the end of the cope. The free ends of the sand strip 16 are beveled, as at 17, and slidably fit against guide blocks 18 which are screwed or otherwise suitably secured to the upper edge of the cope 10, one block 18 being situated intermediate each side and end and being beveled at opposite sides to receive the adjacent ends of the adjacent sand strips 16. The sand strips 16 are flat and project across the upper edge of the cope and are adapted to extend into the sand mold when the latter is packed in the cope. The angular portion of the sand strip 16 has an outstanding projection 19 which extends outwardly from the corner of the cope 10, as shown in Figure 3, and has an elongated slot 20 with beveled edges adapted to re ceive an undercut guide block 21 held by a screw or the like to the top edge of the drag. The block 21 slidably maintains the projection 19 across the corner of the cope, and, cooperating with the adjacent guide blocks 18 holds the sand strip 16 for move ment in a direction diagonal to the cope.

The outer end of the projection 19 is provided with a relatively large opening or aperture 22 in which projects the upper end of an arm 23 carried upon a sleeve 24 adjustably held upon a shaft 25 by a set screw 26, the shaft 25 having bearing at opposite ends in lugs 27 which project outwardly in spaced relation from the adjacent cornerof the cops. One end of the shaft 25 is provided with an offset and angularly extending handle 26 adapted to lie substantially in parallelism with the adjacent handle 14.- of the cope, the handle 28 being so disposed, as shown in Figure 2, that the handle 28 may be grasped in the hand which engages the adjacent handle 14 and upon compression of the hand the handle 28 may be advanced toward the handle 14; to first withdraw the sand strip 16 from the mold before sufficient pressure is exerted upon the main handle 14 to lift the cope.

The strip 16 is normally urged inward by a spring 29 which may be of the coiled type and secured at opposite ends to the adjacent and side end portions of the cope and engaged at its intermediate portion across the arm 23 to normally urge the same in ward and move the handle 28 away from the handle 14. r

The sand strip 16 is held at either one or both of its end portions to the upper edge of the cope it) by lockii'xg lugs 30 mounted upon straps 31 screwed or otherwise suitably secured to the exterior surface of the cope with the lugs 30 projecting inwardly across the upper surfaces of the cope and seated in relatively deep recesses 32 formed in the upper edge of the cope and opening through the outer side thereof only, thus leaving a continuous inner surface wall to the side. Cast or otherwise suitably mounted upon the under surface of the sand strip 16 is a loop or strap 38 which projects into the recess 32 and is of less width and length than the recess for the purpose of permitting the free longitudinal and lateral movement of the sand strip as it is advanced to and fro in its diagonal direction. The strap 33 holds the sand strip to the adjacent edge of the cope 10 when the latter is inverted and at the same time permits the free operation of the sand strip under the action of the spring 29 in one direction and the handle 28 in the other direction. In Figure 2 the cope 10 is shown as inverted and resting upon the drag- 3 1, the latter being provided at its side with brackets 11 in any desired number and of the same construction as above described for carrying a longitudinally extending rod 35 which may have its end portions projecting lengthwise of the rod to form handles 36 for the drag. The offsetting of the handles 14 I of the cope provide ample space between the main handles 14 and 36 of the assembled flask for the positioning and operation of the handle 28 and its parts.

The inner corners of the angular sand strips 16 are provided with notches or recesses 87 adapted to freely receive the edges of the sand mold and to prevent injury to such edges or corners of the sand mold by reason of the withdrawal of the sand strips 16.

1V hat 1 claim is:

1. In a molding flask, a cope comprising an elongated frame adapted to contain a sand mold, brackets arranged exteriorly along opposite sides of the frame, a rod arranged at each side of the frame and engaging through the respective brackets, each rod having its end offset toward one edge of the frame to form handles, and means for securing the rods in the brackets for maintaining the handles in desired position.

2. In a molding flask, a cope comprising a rectangular frame having an angled sand strip arranged at each of the corners of the frame and each provided with arms projecting diagonally outward from the angle of the respective sand stfip, slidable connections between the sand strips and the cope for maintaining said strips against the edge of the frame when the latter is inverted, means for guiding the sand strips for movement in a diagonal direction, means for normally urging the sand strips inward, manumisses ally operated means connected to the strips for drawing the same outward when desired, and lifting means for the cope located relative to the manually operated means of the strips such as to enable the manual grasping of both the lifting means and the manually operated means at the same time.

3. In a molding flask, a cope comprising a frame adapted to contain a sand mold, a handle projecting from the frame for facilitating manipulation thereof, a sand strip movably engaging the frame, means stressing the sand strip inwardly relative to the frame, and means for moving the sand strip against said stressing means, said moving means being located relative to the handle of the frame such as to enable manipulation of the sand strip by the hand of the operator while grasping the handle.

4. In a molding flask, a cope comprising a rectangular frame adapted to contain a sand mold, handles projecting from oppositev EDWARD C. HAFER.

lVitnesses CHRISTIE H. FESLER, H. A. ROBINETTE. 

